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 * Copyright (c) 2025, 2025, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package com.oracle.svm.hosted.webimage.wasmgc.ast;

import java.util.Collections;
import java.util.List;
import java.util.SequencedCollection;

import com.oracle.svm.hosted.webimage.wasm.ast.ModuleField;

/**
 * A recursive group of type definitions.
 * <p>
 * Individual type definitions can be expressed as a recursive group with a single element.
 */
public class RecursiveGroup extends ModuleField {

    private final SequencedCollection<TypeDefinition> typeDefinitions;

    public RecursiveGroup(SequencedCollection<TypeDefinition> typeDefinitions, Object comment) {
        super(comment);
        this.typeDefinitions = Collections.unmodifiableSequencedCollection(typeDefinitions);
    }

    public static RecursiveGroup singletonGroup(TypeDefinition typeDefinition) {
        return new RecursiveGroup(List.of(typeDefinition), null);
    }

    public static RecTypeGroupBuilder builder() {
        return new RecTypeGroupBuilder();
    }

    public SequencedCollection<TypeDefinition> getTypeDefinitions() {
        return typeDefinitions;
    }

    public int size() {
        return typeDefinitions.size();
    }
}
